Bypass Mode_ Dual Input_ Single Unit - Delta Modulon DPH series User Manual

BYPA.
MAIN
Batteries

3.2.3 Bypass Mode_ Dual Input_ Single Unit

When the inverter encounters abnormal situations such as over temperature, overload, short
circuit, abnormal output voltage or low battery, it will automatically shut itself down. If the UPS
detects the bypass AC source is normal, it will automatically switch to bypass mode to protect
the connected critical loads from power interruption. Please refer to Figure 3-20. After the
above-mentioned abnormalities are eliminated, the UPS will switch back to online mode from
bypass mode. During bypass mode, the UPS's tri-color LED illuminates yellow and the text
'Bypass' appears in the upper right corner of the screen.
BYPA.
MAIN
Batteries
Modulon DPH Series
Delta or non-Delta External Maintenance Bypass Cabinet
Q3
UPS
Q2 Q0
Q1
Q5
(Figure 3-19: Battery Mode Diagram_ Dual Input Single Unit)
Delta or non-Delta External Maintenance Bypass Cabinet
Q3
UPS
Q2 Q0
Q1
Q5
(Figure 3-20: Bypass Mode Diagram_ Dual Input Single Unit)
Static Switch
Rectifier Inverter
Static Switch
Rectifier Inverter
3-20
LOAD
Q4
LOAD
Q4